#include"Date.h"


Date::Date(int year, int month, int day)
{
	_year = year;
	_month = month;
	_day = day;
}

Date::Date(const Date& d)
{
	_year = d._year;
	_month = d._month;
	_day = d._day;
}

Date& Date::operator=(const Date& d)
{
	_year = d._year;
	_month = d._month;
	_day = d._day;
	return *this;
}

Date::~Date()
{

}

Date& Date::operator+=(int day)
{
	_day += day;
	while (_day > GetMonthDay(_year, _month))
	{
		_day -= GetMonthDay(_year, _month);
		_month++;
		if (_month > 12)
		{
			_year++;
			_month = 1;
		}
	}
	return *this;
}

Date Date::operator+(int day)
{
	Date tmp = *this;
	tmp += day;
	return tmp;
}

Date Date::operator-(int day)
{
	Date tmp = *this;
	tmp-= day;
	return tmp;
}

Date& Date::operator-=(int day)
{
	_day -= day;
	
	while (_day <= 0)
	{
		--_month;
		if (_month == 0)
		{
			_year--;
			_month = 12;
		}
		_day += GetMonthDay(_year, _month);
	}
	return *this;
}

Date& Date::operator++()
{
	*this += 1;
	return *this;
}

Date Date::operator++(int)
{
	Date tmp = *this;
	*this += 1;
	return tmp;
}

Date Date::operator--(int)
{
	Date tmp = *this;
	*this -= 1;
	return tmp;
}

Date& Date::operator--()
{
	*this -= 1;
	return *this;
}

bool Date::operator>(const Date& d)
{
	if (_year > d._year)
	{
		return true;
	}
	else if (_year == d._year)
	{
		if (_month > d._month)
		{
			return true;
		}
		else if (_month == d._month)
		{
			if (_day > d._day)
			{
				return true;
			}
		}
	}

	return false;
	
}

bool Date::operator==(const Date& d)
{
	return (_year == d._year && _month == d._month && _day == d._day);
}

bool Date::operator >= (const Date& d)
{
	return (*this > d) || (*this == d);
}

bool Date::operator < (const Date& d)
{
	return !(*this > d);
}

bool Date::operator <= (const Date& d)
{
	return (*this < d) || (*this == d);
}

bool Date::operator != (const Date& d)
{
	return (*this == d);
}